70638061 has 16 divisors (see below), whose sum is σ = 77838768. Its totient is φ = 63705600.

The previous prime is 70638059. The next prime is 70638079. The reversal of 70638061 is 16083607.

It can be written as a sum of positive squares in 8 ways, for example, as 27984100 + 42653961 = 5290^2 + 6531^2 .

It is a cyclic number.

It is not a de Polignac number, because 70638061 - 2¹ = 70638059 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70638011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222675 + ... + 222991.

It is an arithmetic number, because the mean of its divisors is an integer number (4864923).

Almost surely, 2^70638061 is an apocalyptic number.

It is an amenable number.

70638061 is a deficient number, since it is larger than the sum of its proper divisors (7200707).

70638061 is a wasteful number, since it uses less digits than its factorization.

70638061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 70638061 is about 8404.6452036954. The cubic root of 70638061 is about 413.3769498862.

The spelling of 70638061 in words is "seventy million, six hundred thirty-eight thousand, sixty-one".